Noone can say if he is gay, bi or straight without knowing him perfectly, and I doubt even him knows what he is. I can only speak about what I feel and what I see.
I just see nothing with a girl, wether it is about just for sex, or even a girlfriend, on his social medias or on OF. I NEVER saw him with a girl in years, and that's pretty weird, don't you know ?
That makes me doubt about him being straight, or even Bi. Don't forget that some "gay" people don't want people to know, that in certain cultures or families, it is a big taboo, even in 2023.